Code snippet used in an IoC blog post

sendSms-ioc.js

import _ from "lodash"

export const smsMessage = (template, isValidPhone) => {
    const createMessage = _.template(template)
    const validate = throwIfInvalidPhone(isValidPhone)

    return _.compose(validate, createMessage)
}

const throwIfInvalidPhone = isValidPhone => user => {
    if (!isValidPhone(user.phone)) {
        throw new Error(`Invalid phone for user ${ user.id }.`);
    }

    return user
}